Results 1 to 10 of about 6,364 (158)
, 2004 Five morphologically distinct bacteria isolated from mangrove sediment by enrichment culture, were identified and tested for their ability to degrade dimethyl terephthalate （DMT） and its isomer dimethyl isophthalate (DMI). DMT at a concentration of 98 mg/
Gu, J, Li, J
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Spatial-temporal Variation of Vegetation Coverage and Its Influencing Factors in Binchang Mining Area from 1986 to 2021 [PDF]
, 2023 [Objective] The change characteristics and influencing factors of vegetation coverage and its spatial distribution in the Binchang mining area were analyzed, and the ecological status of the mining area was evaluated in order to provide a scientific ...
Chen Qiuji +3 more
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Soil Water Characteristics of Different Aerial-seeded Plant Communities at Northeastern Edge of Tengger Desert [PDF]
, 2023 [Objective] Soil water characteristics of different plant communities at different slope positions on aerial-seeded afforestation areas in 1992 were studied at the northeastern edge of the Tengger Desert in order to provide a theoretical basis for the ...
Ge Nan +4 more
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Shuitu Baochi Xuebao, 2022 北京主要河流河岸带实施平原造林工程后,对河岸带植被类型及土壤造成不同程度影响。研究河岸带原有及重建植被类型土壤生态化学计量特征,对河岸生态系统土壤碳氮磷平衡及固碳潜力提升提供科学依据。选取北京温榆河昌平段岸边原有植被类型3种样地(乔木林、乔灌林及草地),重建植被类型2种样地(乔木林与灌木林),共15个样方,采集3层(0—10,10—20,20—30 cm)土壤样品,分析并计算碳(C)、氮(N)和磷(P)含量及计量比。结果表明:原有与重建植被类型的土壤有机碳(SOC)、全氮(TN)、全磷(TP ...
王莹 +5 more
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Spatiotemporal Variations and Topographic Differentiation of Fractional Vegetation Cover in Changbai Mountain [PDF]
, 2023 [Objective] The dynamic changes of vegetation and its response relationship with topography in Changbai Mountain were explored in order to provide scientific support for ecological environmental protection and management in this mountainous area ...
Li Wen, Shi Song, Yang Ziyi, Yu Ran
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Shuitu Baochi Xuebao, 2022 以2000—2020年MODIS-NDVI植被指数为数据源,反演计算黄土高原植被覆盖度,通过转移矩阵和重心迁移等方法分析黄土高原植被覆盖度时空格局变化及其与降水、气温、坡度和土壤类型等因素的关系。结果表明:(1)2000—2020年黄土高原植被覆盖度由0.39提高到0.61,整体呈上升趋势,2017年后实现快速提升;(2)近20年,黄土高原植被覆盖度显著好转类型与极显著好转类型改善面积比例达到37.93%,2009年前以低覆盖和中低覆盖植被为主,2010年后以中覆盖及更高等级覆盖植被为主 ...
王逸男 +4 more
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Shuitu Baochi Xuebao, 2023 为了分析植被覆盖对黄土高原坡面水土流失的影响,量化土壤侵蚀的植被覆盖阈值,基于模拟降雨数据分析了植被覆盖对土壤侵蚀的作用机制,利用绥德、西峰、天水等黄土高原高原典型地区的野外径流小区定位观测资料,探讨了不同覆被类型下植被覆盖控制径流和土壤侵蚀的有效性,确定了不同覆被类型下植被覆盖调控径流和防治土壤侵蚀的植被覆盖下限阈值和上限阈值。结果表明:(1)植被覆盖度的提高增加了土壤入渗、减少了径流量、延缓了径流流速、增加了土壤抵抗侵蚀的能力。(2)坡面径流量随植被覆盖度呈幂函数或指数函数下降 ...
张龙齐 +5 more
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Shuitu Baochi Xuebao, 2005 通过对沙质海岸5种植被类型的土壤物理性状和水源涵养功能的研究,结果表明:(1)混交林和草地的土壤物理性状及贮水能力明显优于纯林地的土壤物理性状;(2 ) 5种植被类型土壤的涵养水源能力大小依次为草地>黑松刺槐混交林>黑松纯林>柽柳林>刺槐纯林;表层土壤高于底层土壤;(3)各植被类型枯落物的饱和持水率在10 5 12 % 4 5 3 6 4 % ,水容量在4 5 833 17t/hm2 之间;刺槐纯林枯落物的水源涵养功能最大;(4) 5种植被类型的涵养水源量在14 76 6 6～1870 38t/hm2 ...
王贵霞 李传荣 许景伟 齐清 王月海 王卫东
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Remote Sensing Classification System of Land Use and Land Cover for Global Coastal Zone Considering Fine Classification of Wetlands [PDF]
, 2018 Land use and land cover (LULC) classification is the important foundation for research on global changes, while establishing a scientific LULC classification system is the fundamental question for research on LULC changes, which is in need of being ...
侯婉, 侯西勇
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Shuitu Baochi Xuebao, 2021 为探讨植被类型及生长季阶段对土壤碳氮磷生态化学计量特征的影响，揭示黄土丘陵区陆地生态系统养分限制及循环规律。以黄土丘陵区典型荒草地（Grassland）、苜蓿（Medicago Sativa）地、沙棘（Hippophae rhamnoides）灌木地、文冠果（Xanthoceras sorbifolium）林地、云杉（Picea asperata）林地为研究对象，分析其0—60 cm土壤有机碳（SOC）、全氮（TN）、全磷（TP）含量及化学计量比特征在植被类型间及生长季阶段内的差异。结果表明：（1 ...
刘帅楠 +5 more
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